Display screen or portion thereof with transitional graphical user interface



FIG. 1 is a front view of a first embodiment (with a rectangular feature) of a first image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 2 is a front view of a first embodiment (with a rectangular feature) of a second image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 3 is a front view of a first embodiment (with a rectangular feature) of a third image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 4 is a front view of a second embodiment (with a square feature) of the first image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 5 is a front view of a second embodiment (with a square feature) of the second image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 6 is a front view of a second embodiment (with a square feature) of the third image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 7 is a front view of a third embodiment (with an oval feature) of the first image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 8 is a front view of a third embodiment (with an oval feature) of the second image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 9 is a front view of a third embodiment (with an oval feature) of the third image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 10 is a front view of a fourth embodiment (with a triangular feature) of the first image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 11 is a front view of a fourth embodiment (with a triangular feature) of the second image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 12 is a front view of a fourth embodiment (with a triangular feature) of the third image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 13 is a front view of a fifth embodiment (with a diamond feature) of the first image of a display screen or portion thereof with transitional graphical user interface showing our new design.

FIG. 14 is a front view of a fifth embodiment (with a diamond feature) of the second image of a display screen or portion thereof with transitional graphical user interface showing our new design; and,

FIG. 15 is a front view of a fifth embodiment (with a diamond feature) of the third image of a display screen or portion thereof with transitional graphical user interface showing our new design.

The outer two broken lines representing a display screen or portion thereof and the remaining broken lines of the graphical user interface form no part of the claimed design.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-3, FIGS. 4-6, FIGS. 7-9, FIGS. 10-12, and FIGS. 13-15. The process or period in which one image transitions to another forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with transitional graphical user interface, as shown and described. 